- A rapid soil health test kit was developed for estimating 12 soil parameters (bulk density, pH, exchangeable acidity, exchangeable Al, organic carbon, available N, P, K, S, Ca and Mg).
- Under natural phosphorus fertility condition (having high organic carbon content of 2.13%, available N 273 kg/ha, available P 12.8 kg/ha and available K 246 kg/ha), cultivar Ngova produced highest grain yield (4.2 t ha-1) while RCPL-1-160 produced lowest yield (3.39 t/ha). However, under phosphorus fertilized condition (0, 30, 60 and 90 kg P/ha), cultivars Shahsarang 1 and RCPL-1-160 demonstrated consistent increase in grain yield from 4.27 to 5.97 t ha-1 and 3.89 to 5.90 t ha-1, respectively. On the contrary, cultivar Ngova responded only up to 30 kg while cultivar RCPL-1-75 responded up to 60 kg ha-1 of applied phosphorous in producing maximum grain yield.
- Out of 1270 mm rainfall received during rice growth period, only 28% (355mm) water was used by the crop for consumptive use (ET loss) while percolation and seepage losses accounted for 72% (914mm) of the total rainfall.
- Use of weed (Ambrosia spp.) biomass as mulch (@1.5 t/ha on DWB) along with 100 % of RD of NPK and lime (@ 20% LR) increased fresh rhizome yield of turmeric by about five and half times over control treatment. In case of zinger, the increase in yield was about three times.
- Fertilizer adjustment equations developed for fertilizer recommendations based on yield target and initial soil test values.
Management of Acid Soils of NE Region
SFAR (Soil Fertility Assessment and Recommendation)